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Avantel filters are available
for Low pass, High pass, Band pass and Band reject functions
in different configurations such as lumped, mechanical cavity
or distributed elements. The filters cover the frequency
range from DC to 10 GHz, for narrow and wide bandwidth applications.
Avantel Duplexer series of filters allow simultaneous receiver
/ transmitter operation through a common antenna port. These
filters cover frequency bands from 30 MHz to 3000 MHz. Filter
configuration in each type is of LC type, Cavity type or
Combline type. Customized high power filters with power
handling capabilities of 1 kW can be developed up to 1 GHz
frequency.
Description
LC Filters
LC filters have the most cost-effective designs. These
are usually smaller in size, as filter elements are realised
using air core inductors or ferrite inductors and silver
mica or chip capacitors. Maximum bandwidths achievable are
limited only by the range of component values.
Cavity Filters
High Q can be achieved by employing cavity resonators,
resulting in low loss and narrow bandwidths. Cavity filters
are relatively easy to manufacture. The bandwidth of a cavity
filter is determined by the aperture size between the cavities.
Larger aperture leads to wider bandwidth of the filter.
Combline Filters
Combline filters are realised using distributed inductors
or lengths of transmission line and distributed capacitance
or lumped capacitance. Combline filters feature high Q,
compact size and bandwidths ranging from 2 to 20%.
Duplex Filters
Each Duplexer is housed
in either a copper or aluminium housing with either helical
or TEM coaxial resonators. Avantel Duplexers use compact
high Q helical resonant cavities for low frequency bands.
Coupling between sections is accomplished through shielded
coaxial transmission lines, which are optimized for rejection
across each filter's range. At higher frequency bands, tunable
TEM coaxial resonators are used and coupling is achieved
through adjustable aperture between resonators. These are
basically bandpass type filters. Computer Aided Design and
CNC machining process have helped these filters to achieve
small size, repeatability and reliability. The filter size
can be optimized for high performance applications. Duplexing
is typically accomplished through a simple Tee-junction.
Fill the Specification Worksheet
to get the Quotation for Filters.
Fill the Specification
Worksheet to get the Quotation for Duplex Filters.
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